Vouchers can be manufacturer coupons, where medication dispensed is reimbursed by the manufacturer, or from a healthcare facility which contracts with the pharmacy for reimbursement, usually at a discounted rate. Medication dispensed using a voucher cannot be taken from free or donated stock.

Another type of voucher used to supplement gaps in stock is between pharmacies. A contract is established with a retail pharmacy who is able to fill prescriptions for approved patients at an agreed upon rate. The voucher is provided by the charity pharmacy to the patient or faxed to the contracted retail pharmacy. The patient picks up the prescription from the retail pharmacy. The retail pharmacy submits a report monthly or as contracted for prescriptions filled. Reimbursement occurs once the invoice/report is verified. Grant funds may provide for the cost of these vouchered prescriptions.